#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
  int i = 10;

  // 拓展运算符：+=,-=,*=,/=
  i += 5;
  printf("%d\n", i);
  i /= 5;
  printf("%d\n", i);

  // 交换m和n的值
  int m = 10;
  int n = 20;
  int tmp = m;
  m = n;
  n = tmp;
  printf("%d %d\n", m, n);
  return EXIT_SUCCESS;
}
